Add a variable to a class instance at runtime: Difference between revisions
Add a variable to a class instance at runtime (view source)
Revision as of 22:36, 14 December 2017
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(→{{header|Kotlin}}: Updated example see https://github.com/dkandalov/rosettacode-kotlin for details) |
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Line 589:
e.foo = 1
e["bar"] = 2 // name specified at runtime</lang>
=={{header|Julia}}==
Julia does not allow direct modification of the data member variables of a type,
though class methods (just Julia functions) can be added without difficulty.
For special situations, such as when parsing an input file, where new data type names
may be appropriate, this can be accommodated using a Dict as one of the class variables.
For example, consider the below SOAP input data for a program processing phone numbers,
where the type of phone numbers for the person is unknown until run-time:
<lang xml>
{"phoneNumbers": [
{
"type": "home",
"number": "212 555-1234"
},
{
"type": "office",
"number": "646 555-4567"
},
{
"type": "mobile",
"number": "123 456-7890"
}]}
</lang>
Add the data into a class member that is declared as a Dict structure:
<lang Julia>
mutable struct Contact
name::String
phonenumber::Dict{Any,Any}
end
person = Contact("Jane Doe", Dict())
person.phonenumber[home] = "212 555-1234"
</lang>
=={{header|Kotlin}}==
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